Title:
LIQUID PUMP
Document Type and Number:
WIPO Patent Application WO/2022/052400
Kind Code:
A1
Abstract:
A liquid pump, comprising a pump body (1), a pressing pump head (2), a joining cap (3), a screw cap (5), a piston assembly (4), a connection member (6), and a valve member (7) which are all made of a full-plastic material. A spring cavity (201) is provided in the pressing pump head; a sealed spring (8) is provided at the interior of the spring cavity; the sealed spring and the spring cavity form a pneumatic elastic-pressing structure; a water blocking structure (9) is provided between the pressing pump head and the joining cap; the pressing pump head is sealedly connected to the piston assembly by means of a set of pullout preventing structures; the piston assembly passes through the interior of the connection member and achieves open-close connection with the connection member by means of a set of opening/closing structures. By means of design of a waterproof structure, the liquid pump does not have the risk of bacteria in a liquid caused by leakage of external water into a liquid container during use; by means of structures such as the pullout preventing and rotation stopping structure and by means of a toughening material, the problem of breakage or liquid leakage when dropped is solved, and the overall sealing performance is improved.
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Inventors:
WANG JINFENG (CN)
Application Number:
PCT/CN2021/072778
Publication Date:
March 17, 2022
Filing Date:
January 20, 2021
Export Citation:
Assignee:
NINGBO SENG CZE MACROSPRAY CO LTD (CN)
International Classes:
B65D47/34
Foreign References:
| CN112193609A | 2021-01-08 | |||
| CN212402061U | 2021-01-26 | |||
| CN109896145A | 2019-06-18 | |||
| CN110547582A | 2019-12-10 | |||
| CN202346098U | 2012-07-25 | |||
| CN111186631A | 2020-05-22 | |||
| CN204896181U | 2015-12-23 | |||
| CN208233711U | 2018-12-14 | |||
| US5363993A | 1994-11-15 | |||
| GB2509531A | 2014-07-09 |
Attorney, Agent or Firm:
HANGZHOU HANGCHENG PATENT ATTORNEY OFFICE CO., LTD. (CN)
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